Malicious PDF — malware analysis report

Static analysis result for SHA-256 31235d236b9b5173…

MALICIOUS

PDF

77.0 KB Created: 2020-12-24 19:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4dd1bd564c80650ac43eb39d109aae05 SHA-1: 74540d11f45d73895e14adfe25fa26b6ebc1db37 SHA-256: 31235d236b9b517395c747b81aaef8f18b8dcbeccb8359def610c017187e6bb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for downloading a game. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing and potential malware distribution intent. While no scripts were explicitly extracted, the presence of malicious links within the document body suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?utm_term=happy+wheels+2+full+game In PDF document text
    • https://cdn.sqhk.co/nanuvoxeva/gemgifM/run_android_apps_on_windows_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/iajd6bP/car_racing_apk_hack_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f93d732e3972.pdfIn PDF document text
    • https://cdn.sqhk.co/wetotuluxe/Iwpjdjg/pixel_gun_apocalypse_unblocked_66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5fa781782731e.pdfIn PDF document text
    • https://cdn.sqhk.co/xakawituk/Gheewjg/74572254042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_5fba9c010d5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_5fdb32e77932b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/00e01cfe-d82d-4bd3-9717-a33ebaf2ce53/89352671366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e760c3a6-7cc7-4f2e-b68d-f2105c189e4c/xiduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd381ab1-606e-4b77-a420-5a53d737e505/every_last_word_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/vsco_cam_filters_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069b1582-4e7b-4856-84e8-1e339a08cd6e/john_muir.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/emulator_android_linux_ubuntu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 5044 bytes
SHA-256: 04cb66c76013e228b0da16fceb8e6d3d90a266e61002432bb73ac3f49fb1cca8
font_01_sfnt_off0000f3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 10840 bytes
SHA-256: 502ea455acae9a0abf289a401b825f35e235663df505d4444bac22ccf93d3172
font_02_sfnt_off000118e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.